Toledo’s Health Care REIT Inc. said today that it has entered into three related deals to acquire 53 existing seniors housing complexes, 17 complexes in the construction phase, and the right to buy another 45 complexes still on the drawing board.

The three deals could total as much as $2.3 billion by early 2017.

The first transaction is an $950 million all-cash deal, including debt assumption, in which Health Care REIT with acquire Toronto-based HealthLease Properties Real Estate Investment Trust and its portfolio of 53 high-quality seniors housing communities located in the United States and two Canadian provinces.

In the second transaction, the Toledo real estate investment trust also has entered into a partnership with Mainstreet Property Group, of Carmel, Ind., which had been managing the HealthLease properties. Health Care REIT will assume management of HealthLease properties but does not intend to hire any employees from either HealthLease or Mainstreet.

The partnership with Mainstreet, which is the largest developer of seniors housing and post-acute facilities in the United States, also will allow Health Care REIT to acquire 17 state-of-the-art seniors housing communities for $369 million.

The 17 communities are under construction and all will be completed between year’s end and the first quarter of 2016, after which they will be leased to Health Care REIT partners Genesis HealthCare, Trilogy, and The Ensign Group.

The Toledo company’s third deal is an agreement with Mainstreet to provide financing and obtain purchase rights for an additional 45 seniors housing development projects. The future projects represents a $1 billion acquisition and it will close in stages upon the completion of 45 projects beginning in 2016 and going through the first quarter of 2017.